| 摘要 |
PURPOSE:To enhance the clamping force of tools by installing a clutch mechanism in between a turning member and a turning nut. CONSTITUTION:When a tool W is clamped by turning the spindle 7 of an electric drill 6, etc. through the holding of a turning member 3, and slidingly retracting a jaw 2 on a gradient, the jaw 2 abuts on the tool W. If the spindle 7 is furtherly turned, the member 3 moves toward the left receiving a clutch spring 20, and a projection 4c runs on to a projection 18 to shut off power transmission to the member 3. The member 3 then starts slipping, and only a turning nut 4 turns. Following that, projections, 4c and 18b, sink into recesses, 4b and 18a, respectively because of the clutch spring 20. And the member 3 moves back toward the right. Later, the projection 4c abuts and runs on to the projection 18b again, and the impact resulting from the intermittent abutting of projections, 4c and 18b, acts on the turning nut 4 as a reaction, which can enhance tool clamping force and smoothly release the tool W. |
